Vitamin D

Vitamin D Hypothesis – A Role in COVID-19 Mortality Rates?

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Vitamin D Levels Appear to Play Role in COVID-19 Mortality Rates

By analyzing publicly available patient data from around the globe, Backman and his team discovered a strong correlation between vitamin D levels and cytokine storm — a hyperinflammatory condition caused by an overactive immune system — as well as a correlation between vitamin D deficiency and mortality.

The research is available on medRxiv, a preprint server for health sciences.

The role of vitamin D in the prevention of coronavirus disease 2019 infection and mortality

In conclusion, we found significant crude relationships between vitamin D levels and the number COVID-19 cases and especially the mortality caused by this infection. The most vulnerable group of population for COVID-19, the aging population, is also the one that has the most deficit Vitamin D levels.

Vitamin D has already been shown to protect against acute respiratory infections and it was shown to be safe. It should be advisable to perform dedicated studies about vitamin D levels in COVID-19 patients with different degrees of disease severity.

Many years ago I approached my former personal care physician and asked to have my Vitamin D level checked.

“What the hell for?”

“I would like to know my Vitamin D blood level to see if I need to take a supplement.”

“Just get outside in the sun for around 20 minutes a day.”

“Just order the test.”

And he did.  Less than a week later Doc called me back to let me know I had Vitamin D deficiency.  I’ve been taking a daily supplement since.

Vitamin D deficiency is now recognized as a pandemic. The major cause of vitamin D deficiency is the lack of appreciation that sun exposure in moderation is the major source of vitamin D for most humans. Very few foods naturally contain vitamin D, and foods that are fortified with vitamin D are often inadequate to satisfy either a child’s or an adult’s vitamin D requirement. Vitamin D deficiency causes rickets in children and will precipitate and exacerbate osteopenia, osteoporosis, and fractures in adults. Vitamin D deficiency has been associated with increased risk of common cancers, autoimmune diseases, hypertension, and infectious diseases. A circulating level of 25-hydroxyvitamin D of >75 nmol/L, or 30 ng/mL, is required to maximize vitamin D’s beneficial effects for health. In the absence of adequate sun exposure, at least 800–1000 IU vitamin D3/d may be needed to achieve this in children and adults. Vitamin D2 may be equally effective for maintaining circulating concentrations of 25-hydroxyvitamin D when given in physiologic concentrations.

The American Journal of Clinical Nutrition, Volume 87, Issue 4, April 2008, Pages 1080S–1086S, https://doi.org/10.1093/ajcn/87.4.1080S
Published: 01 April 2008

An interesting hypothesis that needs more research.

Update 05.16.20

Journal Reference:

  1. E. Laird, J. Rhodes, R.A. Kenny. Vitamin D and Inflammation: Potential Implications for Severity of Covid-19. Irish Medical Journal, 2020; 113 (5): P81 [link]

Journal Reference:

  1. Petre Cristian Ilie, Simina Stefanescu, Lee Smith. The role of vitamin D in the prevention of coronavirus disease 2019 infection and mortality. Aging Clinical and Experimental Research, 2020; DOI: 10.1007/s40520-020-01570-8

 

 

Vitamin D and Mortality Risk in People With CVD

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Summary:     A normal intake of vitamin D can reduce the risk of early death substantially in people with cardiovascular disease, a new study shows. The study concludes that people who have suffered from cardiovascular disease, and have a normal intake of vitamin D, reduce their risk of morality as a consequence of the disease by 30 per cent.

Source article can be found here.

Vitamin D Dosing: Too Low to Matter?

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Autier and colleagues found that vitamin D deficiency, in the observational studies, was associated with cardiovascular diseases, inflammation, glucose metabolism disorders, infectious diseases, mood disorders, declines in cognitive function, and even all-cause mortality.

With the exception of colorectal cancer, being vitamin D sufficient did not appear to reduce the risk of developing various types of cancer.

Vitamin D sufficiency was associated with a lower risk of cardiovascular events (up to 58%), diabetes (up to 38%), colorectal cancer (up to 33%), and all-cause mortality (29%).

via Vitamin D Dosing: Too Low to Matter?.

Race Has Role in Vitamin D Link to Heart Risk

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A 10-ng/mL decrease in 25(OH)D levels was associated with an increased risk of coronary heart disease events in whites (HR 1.26, 95% CI 1.06-1.49) and those with Chinese ancestry (HR 1.67, 95% CI 1.07-2.61), according to Ian de Boer, MD, of the University of Washington in Seattle, and colleagues.

But a similar relationship was not seen among blacks (HR 0.93, 95% CI 0.73-1.20) and Hispanics (HR 1.01, 95% CI 0.77-1.33), the investigators reported in the July 10 issue of the Journal of the American Medical Association.

via Race Has Role in Vitamin D Link to Heart Risk.

A couple of years ago I asked my primary care physician to check my Vitamin D level.  We were both surprised to discover the fact I was Vitamin D deficient.  Since then I’ve been on daily Vitamin D supplementation of 5000iu.

Simple blood test.  Just do it.

The researchers advised caution in interpreting the results in the Chinese and Hispanic participants because of the low sample sizes.

I’m still going to take my supplement.

Vitamin D Level Predicts Death in CABG

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Patients with vitamin D deficiency or insufficiency, defined by levels of 25(OH)D, had significantly higher 90-day mortality after CABG than those who had sufficient levels of the vitamin (OR 5.24 and OR 4.61, respectively), Takuhiro Moromizato, MD, of Brigham and Women’s Hospital in Boston, and colleagues reported during an oral session at the Society of Critical Care Medicine meeting.

The study was limited by its observational design, which can’t prove causality, and by the potential for selection bias and unmeasured confounders.

via Vitamin D Level Predicts Death in CABG.

Vitamin D Plus Calcium May Cut Mortality Risk

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Patients receiving both calcium and vitamin D had a 9% lower mortality rate through 3 years of treatment than those not receiving vitamin D (HR 0.91, 95% CI 0.84 to 0.98), according to Lars Rejnmark, MD, PhD, of Aarhus University in Aarhus, Denmark, and colleagues.

via Medical News: Vitamin D Plus Calcium May Cut Mortality Risk – in Primary Care, Diet & Nutrition from MedPage Today.

How about a non-prescription supplement and vitamin questionnaire?